<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>


<script>
    var json ={
      "name":"zhangsan",
      "age":23,
      "addr":["北京","上海","西安"]
    };

    //获取值
    alert(json.name);

</script>
</body>
</html>